Number Builders

Overview

In this 30-minute lesson, students read and write numbers to 1,000 by connecting base-ten models, place-value charts, spoken numbers, and numerals. The lesson builds on prior work with hundreds, tens, and ones and is taught as two 15-minute mini-lessons for a group of five students.

Learning intentions

Students will be able to:

• Read and write numbers to 1,000 using numerals and models.
• Identify the hundreds, tens, and ones digits in a number.
• Match a base-ten model, spoken number, and numeral.
• Explain the value of a zero in a place-value position.

Success criteria

• I can match a model to the correct numeral.
• I can say a number shown with hundreds, tens, and ones.
• I can write or select the numeral that matches a model or spoken number.
• I can use zero when a place-value position has no units.

Curriculum links

• Grade 2 place value and number representation: read, write, represent, and compare whole numbers to 1,000.
• Place-value understanding: use hundreds, tens, and ones to compose and decompose numbers.
• Mathematical language and representation: connect concrete models, drawings, spoken numbers, and numerals.
• Number-line understanding: represent whole numbers as lengths from 0 on an equally spaced number line.

Lesson structure (30 minutes)

1. 0–3 min · Hook and learning intention. Teacher displays a base-ten model and asks, “How could we tell someone this number without showing the blocks?” Open with the number-building hook and learning intention and read aloud: “I can read and write numbers to 1,000 using numerals and models.” Students turn and talk, then identify the hundreds, tens, and ones they notice.

2. 3–10 min · Mini-lesson 1: Match model and numeral. Teacher models a number such as 321 by placing 3 hundreds, 2 tens, and 1 one in a place-value chart, saying “three hundred twenty-one,” and writing 321; emphasize that each digit’s position determines its value. Students help match additional models, spoken numbers, and numeral cards, explaining their choices. Use large, widely spaced numerals and color-code hundreds, tens, and ones consistently.

3. 10–15 min · Guided practice. Teacher gives each student a place-value chart and number cards, then calls numbers such as 406, 580, and 702; pause to ask, “What does the zero tell us?” Students build each number, read it aloud, and hold up or write the matching numeral. Provide immediate feedback by having students recount the blocks and check each place.

4. 15–18 min · Mini-lesson 2: Read and write numbers. Teacher demonstrates that 406 means 4 hundreds, 0 tens, and 6 ones, while 46 has no hundreds; model how to write the zero as a placeholder. Revisit the place-value chart, zero examples, and guided questions. Students chorally read numbers, then independently write one number from a model and one number dictated aloud.

5. 18–26 min · Independent matching practice. Distribute the number models and numeral matching worksheet. Students match four models to numerals and trace, select, or write each numeral, then complete the five assessment questions. Teacher works beside students who need support, asking them to name each place before choosing an answer. Students who finish early orally or symbolically write number names for selected numerals.

6. 26–30 min · Review and exit check. Teacher revisits the review and answer-check slides and asks students to explain one answer using “___ hundreds, ___ tens, and ___ ones.” Students complete or verbally answer the final item on the worksheet and self-report whether they are ready, getting there, or need more help using the traffic-light check-in exit ticket.

Resources

• the number-building slide deck
• the number models and numeral matching worksheet
• Base-ten blocks or place-value disks
• Place-value charts labeled hundreds, tens, and ones
• Large number cards from 0 to 1,000
• Individual whiteboards and dry-erase markers
• Pencils, crayons, and highlighters
• Optional tactile numeral cards
• the traffic-light check-in exit ticket

Assessment

• During guided practice, listen for accurate use of hundreds, tens, ones, numeral, and digit; ask students to justify matches rather than guess.
• Check the worksheet responses: 321 for 3 hundreds, 2 tens, 1 one; “four hundred six” for 406; the visual representing 580; 702 for 7 hundreds, 0 tens, 2 ones; and 900 for “nine hundred.”
• Use the exit check to identify students who can independently connect a model, spoken number, and numeral and those who need reteaching with zero or place position.

Differentiation

• Support students with numbers under 100 first, number tiles, a completed place-value chart, tracing lines, verbal answer choices, and concrete blocks. Prompt with: “I see ___ hundreds, ___ tens, and ___ ones, so the numeral is ___.”
• For dyslexia-friendly access, use a clear sans-serif font, large spaced numerals, limited visual clutter, consistent color coding, audio modeling, and tactile/visual matching. Read every direction and number aloud without requiring students to decode dense text.
• Offer students the option to point, select, build, say, trace, or write responses. Seat students where they can clearly see models and teacher demonstrations.
• Extend learning by asking students to write or orally compose number names, explain the role of zero, or create a model for a partner to read.